Two-Dimensional Flying-Height Modulation Mapping at HDD Drive Level

• Published in: IEEE transactions on magnetics Vol. 42; no. 10; pp. 2516 - 2518
• Main Authors: Shimizu, Y., Junguo Xu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-10-2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Calibration; Cross-disciplinary physics: materials science; rheology; Disk recording; Equations; Exact sciences and technology; Flying height; Frequency measurement; Frequency response; Harmonics; head-disk interface (HDI); Magnetic heads; Magnetic modulators; Magnetic recording; Magnetism; Mapping; Materials science; measurement; Modulation; Other topics in materials science; Physics; Signal processing; Thickness measurement; Two dimensional; Two dimensional displays; Wavelength measurement; Wavelengths; Head disk interface; Proceedings; Flying height; Disks; head-disk interface (HDI); measurement; Magnetic recording; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2006.878630

A measurement system for flying-height modulation of magnetic heads is proposed, and two-dimensional (2-D) flying-height modulation mapping is demonstrated at the drive level. The measurement system is based on the triple harmonic method, which uses a readback signal from the read element of the magnetic head. This technique, which maintains a constant wavelength of the pattern for fly-height modulation measurement, was proposed to achieve 2-D flying-height modulation mapping. Moreover, the frequency response of the measurement system was calibrated, and measurement accuracy was improved